US2012329A - Slip - Google Patents

Description

2 Sheets-Sheet 1 SLIP Filed Jan. 7, 1935 H. P. WICKERSHAM ET AL 15mg. 2?', w3.

o W f AME 27 i935 H. P. WICKERSHAM ETAL m@ 'SLIP Filed Jan, 7, 1935 2 Sheets-Sheet 2 et i lili

Patented Aug. 2

This inversinl relates te `well drilling SLIP Harry A .,cliersliam, II'untington vParli, and Erwin Burns, LosI Angeles, Calif.

Asplieiiss Jiiiie'ry 7. 1935, sei-iai Ne. est

Claims. (Cl. 2li-5263i I edinbment and relates more particularlyto for use in the rotary tablevof amwell drill y general object of the inventionfi's to pr f5 ple,` practical, and effective slips referred to.

` Another object `of the a slip for use in arotary .,rig. y A de sinimye'ritierifiif te' drevide table that islvery positive andA dependable in gripping' and supporting `a pipe orgthe like.

Another object of the inventioiiie td provide a. slip of the character meniionedthet ,mbdies a toggle actuated liner or pipe engaging element that is automatically moved inwardly te grip the pipe with great force upon assuming'. `the weight ora portion ofthev weight ofthe pipe that `is automatically freed pipe is raised toI allow n l slip. from the rotarytable bushing Another object of the invention .frcmifl' Pipewh the. the easy ,removal of the isfto provide al slipof the character mentioned that is oper able to grip a pipe or like object'v vitl'l` g'f'reat force without editing or i otherwi injuring' The pipe gripping member embodi `vention is adapted to be forced inwardly against ythe pipe by the toggle meanswith great force' and,

therefore, may have parts of substantial'area which pipe.'

are effective in The large' broa sa s 'er the regale actuated@ ieiiiter de iiiid er injure `the pipel ofi the slipenow ingeher'al" @A further objectl of slip lof4 the avide a the nii/'ended islid piojeriaraeier meiitieiid'iliat' may be adjusted to properly and effectivelii handlev o'r "grip pipejof variousfdiarne'tersl The v ario` objects' aridi features er the iiive'iijthe 'following det the" present invention "bushing of arotary table. y e

sectional "vieilvL taken' substan- 1 verticalv detailed iled deseripiieil" die" typieal preferred form and application" efitlyfe arranged th4 l Figi. 2` isi spider er enlarged the pipe arldfbushing ande are enlarged horiaontaldet Views taken as 'indicated respectively, on Fig. `2l

'd1' sectional by' liners-r and 4A,

liary table te euppjri of the liaracterA the opening O of the bushing B, a

sftrigs, ete. ln the drawings we llaveillustaie'd the invention embodied in a set ofV three slips S we will proceed with a detailed description of one slip, it being understood that such description the ser.. l t

The slip S of the present inventionA includes, f5 generally,` a body Ill adapted to be -arrangedin pipe engaging liner or member l I and toggle means I2l actively mounting or supporting the member II on the body Ill to grip the pipe P. The-slip body l0 is shaped to seat in the opening'O' and is preferably proportioned-to project upwardly from the upper surface of `thebushir'i'g B when in operative position in the opening. l The maier portion I3`fof the external or outer surface g5 of the 'body l0 is convex and is tapered downwardly and inwardly to bear on the wall of the may apply equally well to the several slips S of opening O. The upper portion of the outer sursides I4 ofthe body are provided with faces VI5 which are substantially radial relative tothe `3]; longitudinal axis of the opening O. The radial faces I5 extend inwardly to the inner side of the body I0 andlugs or ribs I6 project from. the faces I5 to cooperate with corresponding ribs adjacentslips. l e l AThe inner side- 4of the body I0 is shaped or formed to receive the pipe engagingmember II. In accordance with the invention a recess or vertical channel I'l is providedin the inner side of the bodylll to house or carry the member. I I. s The channel Il is preferably comparatively -wide and of substantial vertical extent. In the embodiment of the invention illustrated in the drawings the channel Il extends downwardly from the upper end ofthe body I EI to an inwardly pro- 56' jecting flange I3 adjacent the lower` end `of the bodyr The inner wall I9 of thechannel- I1 may be flat and vertical and substantially-tangential utolalcircle concentricl with the longitudinal airis ofthe opening O. rThe opposite' side walls 2D of the channel I1 are at and parallel. The slip body IU is preferably hollow to be light in weight and to receive or carry the principal parts of the means I2. In the case illustrated in the drawings, the body I has a single continuous longitudinal internal cavity or space 2|. A suitable handle 22 is pivotally connected with the upper end portion of the body I0 as at 23 to facilitate the ready handling of the slip.

The liner or pipe'engaging member II is carried bythe means lI2 to shift inwardly and grip the pipe P upon assuming the weight or a portion of the Weight of the pipe. The member may be a simple integral part as illustrated throughout the drawings. The outer side 24 of the member II may be fiat and vertical to seat against the wall I9 when the member is Hin its Y retracted position. The member is providedv with flat parallel opposite sides 25 for'shiftably or Walls 2U of the` slidably cooperating with the side vrchannel I1. rIhe inner surface or side ofthe member II'is concave being cylindrically concaved and formed to? substantially conform to the pipe P.. vThe invention contemplates the provision of teeth or sharpenedserrations or ridges onthe inner surface of the member'l I to grip the pipe P. It is'preferred, however, to provide parts on the inner siuface of the member I I having surfaces of substantial area for contacting the pipe.- In the preferred construction illus- .tratedinV the drawings the inner surface of the .member I I is provided with a multiplicity of verticallyspaced horizontal or circumferential grooves 26 leaving a multiplicity of spaced horizontal or circumferentially extending ridge parts 21. The parts 21 present cylindrically curved or .concave surfaces 28 of substantial extent or area for contacting the pipe P. The surfaces 28 are :preferably continuous or unbroken and are smooth to effectively engage or grip the pipe Without Amutilating, cutting or biting into the pipe. The grooves 26 and the parts 21 are flat- :sided or rectangular, it being understood that the -faces of the parts 21 may be suitably rounded or bevelledif found desirable. VThe pipe engaging .parts 21 may be vertically spaced throughout theinner side of the member I I and may extend .from one side to theother of the member. yA retaining plate 29 may be removably attached to -the upper end of the body I0 and may have a -flange part 30 extending downwardly into the upper portion of the channel I1.

The means I2 mounts or supports the pipe envgagingl member I I on the body I0 and is in the nature of a toggle means for actuating or forcing the member I|`into tight holding cooperation with the pipe P when the slips S assume the load or weight of the pipe P. The means I2 includes one or more toggles 3| connecting the member I I with the body I0. In the particular case illustrated in the drawings there are Vtwo `vertically spaced toggles 3| pivotally connected with thek body I0 and the outer side portion of "the'member II. The inner and outer ends of vthelinks or toggles 3| are preferably cylindrically rounded. The outer ends of the toggles3| pivotally bear in suitably shaped seats 32 in the lbody I 0. The seats 32 may occur in the inner `ends of bosses 33. Pins 34, having their end portionsl carried in openings 35 in the body, extend through openings in the toggles 3| to pivotally connect the toggles with the body.l The jlinks orrtoggles 3| project inwardly from the space-2|v throughl openings 36 in the inner wall ofthe body.V Cylindricallyconcaved seats 31 are .may

lin positions to. properly cooperate with pipe of I I with the pipeP ,on the slips. ythe members I I of the slips causes the members ytransmitted from the members `by the toggles 3|.

provided in the outer side or surface 24 of the member II to receive the inner ends of the toggles 3|. Suitable pins 38 pivotally connect the member II and toggles 3|. The links or toggles 3| are preferably of considerable width and the openings 36 are proportioned to allow for the desired pivotal movement of the toggles 3| and the required motion of the member II. The parts are related so that the toggles 3| are adapted to `engage'thelower walls of the openings 36 to vbe held againstv further downward movement before reaching a horizontal position so that the ypipe engaging member I| cannot be locked or kset in a projecting actuated position. When a load is imposed on the member I the force is transmittedthroughthe toggles 3| to the body le and causes the links or toggles to pivot downwardly and inwardly to tightly force the member II against the pipe P.

f Means may be provided for normally holding the pipe engagingl member I in its retracted position `and for returning or for aiding in return- Vingthe member toits retracted position after use. Springs'dil are connected with the body |U and toggles 3| to normally urge the member II to the retracted'position illustrated throughout L the drawings. The springs 49 may be suitable spiralled springs and may be connected with the .body I0 and toggles 3| by pins 4I in the manner illustrated in the drawings. The springs'40 are suiciently strong to normally hold the pipe engaging member in its retracted position in engagementwith the wall I9 of the channel I1. The invention may include means for adjusting or setting the member II in and eiectivelycooperate with pipes of various diameters. vA set screw or adjusting screw 42 may be threaded through an opening in the retaining plate 29 andpart 33 to cooperate with the upper end of the member II. The screw 42 be threaded downwardly to limit the upmovement of the member II and stop it different diameters. It will be apparent how the setting `or adjustment of the screw 42 may determinethe position that the slips S may assume lprovided by this invention will be readily understood from the foregoing detailed description. Upon a slip S being arranged or inserted in the opening Oto cooperatewith a pipe P the parts `21 onthe inner side of the member of the slip engage the pipe while the tapered external surface I3 of the body is adapted to cooperate with the taperedwall of the opening. As described above the springs normally hold the member I in the retracted position. `Engagement of the member during the arrangement or insertion of the slip in the opening O merely tendsto move or shift the pipe gripping member to its retracted position. When the several slips S have been inserted in the opening O the weight ofthe pipe or the string of pipe may be imposed The weight of the pipe P coming on to shiftl downwardly. v'I'his downward shifting of the members I is accompanied by a downward rand inward pivoting of the links or toggles 3|,

II intoitightgripping and holding cooperation position to properly with the pipe P. It is believed that it will be understood how the members II are tightly forced against the pipe P by the action of the links or toggles 3l.

The parts 21 having the large smooth faces 28 for contacting with the pipe do not cut into or otherwise injure the pipe. The action of the toggles 3| causes the members II to be held inwardly against the pipe with such force that the broad or extensive surfaces 28 are effective in holding and gripping the pipe. Upon the pipe P being raised the engagement of the parts 21 with `the pipe causes the members I I to shift upwardly. This upward shifting of the members I I relative to the slip body I0 is accompanied by outward movement caused by the upward and outward pivoting of the toggle links or toggles 3|. The springs 40 may aid in retracting the members II. The gripping or pipe engaging members II are quickly and automatically freed from the pipe P allowing the slips S to be easily removed from the opening O. The pipe engaging members II may be removed for replacement by detaching the retaining plate 29 and cutting out or driving out the pins 34 or 38 to free the members from the bodies I0. The members I I may be replaced by pipe engaging members formed to cooperate with pipe of different diameters. The slips of the present invention are simple and convenient to handle and are particularly effective in operation.

Having described only typical forms and applications of our invention, we do not wish to be limited or restricted to the specific forms and applications herein set forth, but wish to re- Serve to ourselves any modications or variations that may appear to those skilled in the art or fall within the scope of the following claims.

Having described our invention, we claim:

1. A slip of the character described including a body, a pipe engaging member, and a toggle connecting the member with the body operable to cause inward movement of the member upon the member assuming a load.

2. A slip oi the character described including, a body, a member at the inner side of the body for engaging a pipe, and means connecting the member with the body operable to force the member inwardly relative to the inner side of the body upon assuming a load.

3. A slip of the character described including a body, a member at the inner side of the body for engaging a pipe, and means connecting the member with the body to move inwardly relative to the inner side of the body upon assuming a load, said means including a toggle link. pivotally connected with the body and member.

4. A slip of the character described including, a body, a member at the inner side of the body for engaging a pipe, and vertically spaced toggles connected with the body and member to cause the member to be moved inwardly when assuming a load.

5. A slip of the character described including, a body, a member at the inner side of the body for engaging a pipe, toggle means for causing the member to move inwardly upon assuming a load, and means yieldingly holding the member in a normal out position.

6. A slip of the character described including a body having a channel in its inner side, a

lthe channel when a pipe engaging member shiftable longitudinally and laterally in the channel, and means for actuating the member inwardly when a downward force is applied to it including a toggle acting between the body and member.

7. A slip of the character described including a body having a channel in its inner side, a pipe engaging member shiftable longitudinally and laterally in the channel, and means for actuating the member inwardly relative to the wall of downward force is applied to it, said means including a toggle supporting the member on the body.

8. A slip of the character described including a body having a seat, a member for engaging pipe at the inner side of the body, and a toggle bearing in the seat and pivotally connected with the member to-cause the member to move inwardly when subjected to a downward force.

9. A slip for use in a rotary table including a body for arrangement in the table, a member at the inner side of the body for engaging a pipe, the member having a seat, and a toggle pivotally connected with the body and cooperating withthe seat whereby the member moves inwardly when moved downwardly.

10. A slip for use in a rotary table including a body for arrangement in the table, a member at the inner side of the body for engaging a pipe, toggle links connecting the member with the body whereby the member moves inwardly when moved downwardly, and a spring connected between a link and the body normally urging the member upwardly.

11. A slip of the character described including a body, a member at the inner side of the body for engaging a pipe, spaced parts on the member having surfaces of substantial extent for contacting the pipe, and toggle means for moving the member inwardly as it is moved downwardly.

12. A slip for use in a rotary table including a body for arrangement in the table, a pipe gripping member at the inner side of the body, parts on the member having substantially cylindrically concaved surfaces for contacting the pipe, and

toggle means for causing the member to move inwardly as it is moved downwardly.

13. A slip for use in a rotary table including a body for arrangement in the table, a pipe gripping member at the inner side of the body, the member having a substantially cylindrically concaved inner side, there being spaced grooves in said inner side leaving parts with relatively smooth surfaces of substantial area for contacting the pipe, and means for causing the member to move inwardly relative to the body upon assuming a load.

14. In a slip of the character described, a pipe gripping member having projecting parts with relatively smooth surfaces of substantial area for contacting the pipe.

15. A slip for use in a rotary table including a body for arrangement in the table, a pipe gripping member at the inner side of the body, toggle means for causing the member to move inwardly as it moves downwardly, yieldable means normally holding the member against downward movement, and means for adjusting the member vertically.

HARRY P. WICKERSHAM. ERWIN BURNS.

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